So getting "Segmenation fault" is normal when mining Datacoin?
From my experience segfaults aren't that often. I faced connection problms mainly, i.e. when primeminer is working and mining, but not sending shares to pool for some unknown to me reason (and here comes the DMW).
I just got this script running though, and so far, so good. I haven't been able to get the logs working right. I don't think I'm saving them in the right directory, but I probably don't need to see them anyway.
If you don't see any errors in the output, then the catalog with logs should exist somewhere (otherwise, invocated shell programs would be calling for nonexistent resource).